As the United Nations turns 80, calls for reform are louder than ever. Against the backdrop of multiple global crises, strongman diplomacy and rising threats from climate change to AI, a growing campaign is calling on the UN to revisit the outdated charter established in 1945 and work on reinventing the organization. 

"We need to start rethinking what kind of institution we would like to establish to make sure the 21st century does not become as violent as the 20th century," says Tim Murithi, head of the Peacebuilding Interventions Program at the Institute for Justice and Reconciliation.